厚壁钢管张力减径过程的变形规律研究

摘要

荒管壁厚和张力系数是张力减径工艺的重要参数,对成品钢管质量具有直接影响.针对20机架钢管张力减径过程建立热力耦合有限元模型,并选择9种不同壁厚的钢管进行数值模拟,得到了张力减径过程中金属的流动规律,研究讨论了钢管内多边形的形成机理,总结了荒管壁厚和张力系数对张力减径工艺的影响规律.%Initial tube thickness and tension coefficient are important parameters in stretch reducing process,which could influence the product quality directly.The thermal-mechanical coupled finite element models with nine initial tubes of different thickness have been established to simulate the process of 20-stand stretch reducing mill.The metal flow rules during the stretch reducing process and forming mechanism of internal polygon have been investigated systematically.The influence rule of initial tube thickness and tension coefficient to stretch reducing process has been summarized.